In order to make the right decision for your network you should know the basics regarding all three. Jan 08, 20 glbp configuration example on two ios routers the configuration example of glbp on ios is as follows router r1 perspective. In our simple network above, we want to provide redundancy to the border routers r1 and r2 which connect users to the internet. If you have no idea what a virtual gateway is then read my introduction to gateway redundancy first. View and download cisco nexus 9000 series configuration manual online. Note that only the commands specific to hsrp are shown in this example. May 06, 2011 see cisco glbp in action, and how to configure and verify that it is working. Basic cisco commands by marcus nielson 2014 configuring basic switch settings switch examples enter enable if the prompt has changed back to switch. On router a, priority for group one is higher, making it active for group one, while on router e, priority for group two is higher, making it active for group two.
Gateway load balancing protocol is a cisco proprietary protocol for both redundancy and load balancing in cisco switches and routers. We will use the figure below as an example network topology. Basic glbp configuration is nearly identical to hsrp. To accomplish this, r1 is selected as the primary router, and r2 is the secondary router. See cisco glbp in action, and how to configure and verify that it is working.
Also i would recommend to look at the hsrp and vrrp lessons before you continue with glbp. Lets take a look at a configuration example so you can see how this works. Understanding gateway load balancing protocol glbp gateway load balancing protocol glbp is a cisco proprietary solution for redundancy and load balancing in an ip network. By configuring one of the redundancy protocols hsrp, vrrp, glbp we can achieve just that. Glbp gateway load balancing protocol explained networkel. Glbp gateway load balancing protocol gateway load balancing protocol glbp protects data traffic from a failed router or circuit, like hot standby router protocol hsrp and virtual router redundancy protocol vrrp, while allowing packet load sharing between a group of redundant routers. Aug 09, 2012 i will take a little break regarding multicast. Glbp works by making use of a single virtual ip address, which is configured as the default gateway on the hosts. Prerequisites for gateway load balancing protocol before configuring the glbp feature, ensure that the routers can support multiple mac addresses on the physical interfaces. The ccnp bcmsn portable command guide is filled with valuable, easytoaccess information and is portable enough for use whether youre in the server room or the equipment closet. Glbp main distinction from hsrp and vrrp is its ability to natively provide gateway load balancing to end devices, hence increase in protocol.
The following chart provides a quick breakdown of each protocol. Figure 402 mhsrp load sharing 121235 active router for group 1. Oct 21, 2010 in the world of first hop redundancy, we have plenty of choices. Configuration examples for gateway load balancing protocol, page. Oct 04, 2010 several employees need to have access to send data, no matter what happens to the network. I will use the following topology to configure glbp. Hsrp vrrp glbp router computing networking standards. Although vrrp or hsrp provides a network link redundancy to router traffic in a or a number of routers in case of failure to the main active routes, but they do not allow to fully utilizing the available network resources. I have decided to look deeper into glbp as i am quite familiar with hsrp or vrrp but the other day i. Glbp gateway load balancing protocol gateway load balancing protocol glbp protects data traffic from a failed router or circuit, like hot standby router protocol hsrp and virtual router redundancy protocol vrrp, while allowing. If there are more than 4 gateways in a glbp group then the rest will become standby virtual forwarder svf which will take the place of a avf in case of failure a is not correct. Hsrp use case the figure 4 defines the overall structure. The figure below shows a basic glbp topology with r1 and r2 forming a glbp group. Glbp configuration example pdf glbp is a cisco proprietary protocol that attempts to overcome the limitations of existing this section will first go over the configuration process steps.
Note for mhsrp, you need to enter the standby preempt interface configuration command on the hsrp interfaces so that if a router fails and then comes back up, preemption restores load sharing. Provide redundancy on your cisco routers with glbp by david davis ccie in networking on october 6, 2005, 12. Figure 51 shows the network topology for the configuration that follows, which shows how to configure hsrp using the commands covered in this chapter. In this section, the configuration is extended to show basic glbp authentication using key chains, altering the default load balancing behavior to weighting, and basic interface line protocol tracking. The main disadvantage of hsrp and vrrp is that only one gateway is elected to be the active gateway and used to forward. Aug 06, 2019 gateway load balancing protocol glbp tutorial. Glbp gateway load balancing protocol provides first hop redundancy for devices that use a default gateway. Several employees need to have access to send data, no matter what happens to the network. Start studying cisco gateway load balancing protocol glbp. Configuration examples for gateway load balancing protocol additional references command reference glossary. A backup virtual gateway can become the avg only if the current avg fails.
In the world of first hop redundancy, we have plenty of choices. We got switch sw2 and sw3, and we want to setup sw2 to be the master vrrp routerswitch and switch sw3 to be the backup routerswitch. Cisco gateway load balancing protocol glbp quizlet. Configuration tasks, page 6 monitoring and maintaining glbp, page 10 configuration examples, page 10 command reference, page 12 glossary, page 38 feature overview the gateway load balancing protocol feature provides automatic router backup for ip hosts configured with a single default gateway on an ieee 802. Enable glbp tlbp using the configured key chain and group number of 1. Jun 25, 2017 glbp is a cisco proprietary protocol like hsrp, but has differences surely and we will talk about how gateway load balancing protocol glbp works, what is gateway load balancing protocol glbp.
Hsrp and glbp are cisco proprietary c is not correct. Note that only the commands specific to glbp are shown in this example. In this example, routera is the avg and routerb is an avf. Glbp provides load balancing over multiple router gateways using a single virtual ip address and multiple virtual mac addresses. Gateway load balancing protocol glbp is a cisco proprietary protocol that attempts to. Create and enter into key chain key configuration mode. Once switchb recovers, it will not retake its role of active router, despite having a higher priority. Rafat khandaker packet tracer hsrp vrrp glbp 051816. To enhance the reliability of the network you decide to configure glbp gateway load balancing protocol, in addition you want to configure loadbalancing. Glbp is a cisco proprietary protocol like hsrp, but has differences surely and we will talk about how gateway load balancing protocol glbp works, what is gateway load balancing protocol glbp. Scribd is the worlds largest social reading and publishing site.
If switchb was powered on first, it would become the active router. Glbp configuration example pdf glbp is a cisco proprietary protocol that attempts to overcome the limitations of existing this section will first go over the configuration process steps and commands that are used to perform a basic glbp configuration. The video demonstrates glbp configuration on two routers providing an ip gateway. Figure 52 shows the network topology for the configuration that follows, which shows how to configure glbp using commands covered in this chapter. Hsrp overview and basic configuration cisco community. Hsrp is configured between two devices which each have a single interface that goes towards the core of the network, an interface that connects them together not an hsrp requirement, and an interface that connects into a common subnet. Icnd2 hsrp vrrp glbp question 1 which one of these is a valid hsrp virtual mac address. Glbp allow automatic selection and simultaneous recovery from first hop router failures. Abstract in this lab, i will simulate failsafe protocols designed in cisco routers and layer 3 switches to simulate load balance or distribute traffic through a network. The configuration of gateway load balancing protocol glbp on cisco router is easy and very much similar to that of hot standby router protocol hsrp and virtual router redundancy protocol vrrp. I hope that this article provided some insight into the configuration steps that are required to configure glbp and get it up and running. I have decided to look deeper into glbp as i am quite familiar with hsrp or vrrp but the other day i had to troubleshoot a network.
Glbp gateway load balancing protocol glbp gateway load balancing protocol is a cisco proprietary protocol that attempts to overcome the limitations of existing redundant router protocols by adding basic load balancing functionality. Glbp stands for gateway load balancing protocol and just like hsrp vrrp it is used to create a virtual gateway that you can use for hosts. Hot standby router protocol hsrp one picture summary. Glbp gateway load balancing protocol cisco systems. Hot standby router protocol hsrp configuration pearson. Lets take a look how to setup vrrp using this topology. Enter the key string that will be used to authenticate with neighboring devices. For the example in this section, the topology shown in figure 1 is used. Kindly assist in troubleshooting glbp functionality glbp has been configured one 2951 and 3945 using the etherswitch module on 3945 routers, using ospf.
Hsrp vrrp glbp free download as powerpoint presentation. Gateway load balancing protocol glbp is one of the nhrp kind protocols that protects traffic from a router or circuit. Router r1 is also the avf for the virtual mac address 0007. An ip address is assigned as a virtual ip address from the local subnet which is configured as a default gateway for all the local. The different routers that assume the forwarding role use different virtual mac addresses for the same virtual ip address to which packets are forwarded by. If switchb fails, switcha would take over as the active router. Apr 29, 2015 glbp gateway load balancing protocol 1. First hop redundancy protocols configuration guide, cisco ios release 15sy by cisco. This book will help you memorize commands and concepts as you work to pass the ccnp bcmsn exam 642812. Mar, 2019 enable glbp tlbp using the configured key chain and group number of 1. Vrrp configuration best cisco ccna ccnp and linuxcentos. See the configuring mhsrp section on page 4010 for the example configuration steps. First hop redundancy protocols configuration guide, cisco ios xe. After configuration, the loadbalancing is working properly, as the route from the local systems periodically changes from route 1 to the othe.
Glbp operation best cisco ccna ccnp and linuxcentos pdf. As previously explained, all routers in glbp are actively forwarding packet. A explanation with hsrp, two or more devices support a virtual router with a fictitious mac address and unique ip address. In this scenario, on site a multiple clients reside on the fast ethernet segment of 198. We can configure glbp in cisco ios router using three algorithm. Cisco gateway load balance protocol glbp configuration. Gateway load balancing protocol glbp geeksforgeeks. You must configure each gateway in a glbp group with the same group number, and at least one gateway in the read more. The router r1 is the avg for the glbp group and is responsible for the virtual ip address 192. Pdf performance evaluation of first hop redundancy. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
To enhance the reliability of the network you decide to configure glbp gateway load balancing protocol, in addition you want to configure loadbalancing to make optimal use of the resources you have. Aug 11, 2019 glbp configuration example pdf posted on august 11, 2019 by admin glbp is a cisco proprietary protocol that attempts to overcome the limitations of existing this section will first go over the configuration process steps and commands that are used to perform a basic glbp configuration. Glbp gateway load balancing protocol and its name suggests one of the big benefits, its bring to the table is the ability to do loadbalancing easier than we could do otherwise. This is gonna be very similar with hsrp configuration. For example, you might configure an interface on switch 1 as an active router and one on switch 2 as a standby router and also configure another interface on. Hsrp vrrpd glbp standard rfc2281 rfc3768 none load balancing no no yes osi layer3 layer3. For this example, ill use hsrp goup one and hsrp group two. Provide redundancy on your cisco routers with glbp techrepublic. You can configure glbp in such a way that traffic from lan. The router r2 is configured with the default priority communication between r4 continues without disruption or change at the host side.
199 399 946 814 428 1464 486 1038 575 1523 1438 1341 507 342 659 1491 1244 1603 608 905 482 287 1234 1593 216 1401 1045 1269 124 1479 736 202 711 209 148 1481 404 453 123 390 1242 1408 518 884